I've had this issue for years. I have been asked this constantly. I am a bad liar, so I do usually say I'm on disability. Only 1-2 people have been rude enough to ask what problem has made me disabled, which I usually respond that I really do not want to talk about it.

One girl in my group made me laugh. She says when she's asked, she always tells them that she works for X Hospital's PHP. If they asked what she did, she says she's in counseling. LOL. She DOES work hard on herself in groups. Just bending the truth a little! LOL